0.1 millimole ofCdSO4 are present in 10 ml acid solution of 0.08 N HCl. now H2S is passed to precipitate all the Cd2+ ions. the pH of the solution after filtering off the precipitate,boiling off H2S and making the solution 100ml by adding H2O is?
H2S precipitatates Cd2+ as CdS and furnishes H+ ions. Molarity of HCl and initial vol provide info about initial H+ ions conc. H+ ions from H2S can be added to this and pH can be found after dilution.